I love our berber carpet. We have had it for 10 years (sage green) and it still looks great.... of course with the new renovation in kitchen we will have to replace the carpet in living room as well. But we have horses and 3 dogs, and it shows nothing!

Another vote for berber. I'm not a big fan of carpeting at all, but I used to live in an apartment which was carpeted in berber. It looked great, as far as carpeting goes. Warm and home-like, rather than commercial, but with durability closer to commercial. If something stays looking nice in a rental, with a variety of sometimes less-than-careful residents, I'd say it's a good choice.